Trapezia and Tetralia Ectoparasites — Knudsen 
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Fig. 1 . Trapezia f. ferruginea: A-D, Dactyli 1-4; E, tip of dactylus 1; F, a bristle from food comb; G, 
2nd maxilliped. Tetralia heterodactyla: H-K, Dactyli 1-4; L, 2nd maxilliped; M, a bristle from maxilliped 
food brush. Anatomy: 1, food brush; 2, food comb; 3, groove. (All drawings to the same scale except E.) 
